SIGN UP FORM WHIT HTML AND CSS

Hi, the warning pop up because you don't have a label tag in the inputs. If someone that has vision problems needs to access the site using a screen reader, he/she won't know which input is required (a password? a name?). If the design doesn't require a label tag, you have to add an aria-label property, for example:

<input aria-label="last name" type="text" placeholder="last name" required>
<input aria-label="Email Address" type="email" placeholder="Email Address" required>
<input aria-label="password" type="password" placeholder="Password" required>

When the screen reader focuses on the input, it will read the aria-label and the person will know what is required.

Hope it helps.

hello there! I did the same project. I think you can check my code to get an idea if you wish: https://www.frontendmentor.io/solutions/intro-component-with-signup-form-WVrMKMk6l not perfect, but it will help.😊